Turn ISO 26262 terminology into reasoning you can use. Explore clear explanations, visual examples and practical decisions, one safety topic at a time.
The complete FSC guide. 13 chapters. No credit card.
The complete collection
Search titles and summaries, filter by plan, or jump to a phase. Each guide has a public overview you can read before registering.
Parts 1, 2 and 8
Vocabulary, lifecycle, roles and the management system everything else assumes.
Part 3
From the item definition to safety goals, ASILs and the functional safety concept.
Part 4
Technical safety concept, architecture, interfaces and the mechanisms that make a system safe.
Parts 5 and 11
Hardware development, the metrics that prove it, and semiconductors.
Parts 6 and 8
Software process, architecture, coding, tools, platforms and reuse.
Part 9
The inductive, deductive and systemic methods, and when each earns its place.
Parts 2, 4 and 8
Testing, fault injection, the safety case, assessment, and life after design release.
Applied
The same standard applied to brakes, batteries, steering, perception and cameras.
SOTIF, cybersecurity, ML, other industries
Where ISO 26262 ends and its neighbours begin.
01 / Quick answers
The questions engineers ask most often about the concept phase and safety analyses. Each guide then works through the topic in full.
One braking example. Choose a step.
Maintain vehicle stability
The Functional Safety Concept turns safety goals into functional requirements: safe states, fault reactions and the behaviour needed to stay safe.
Specify the required response to unintended braking to maintain vehicle stability.
You produceFunctional safety requirements
Explore the FSC guideConcept phase
Hazard analysis and risk assessment rates each hazardous event for severity, exposure and controllability. Together they give an ASIL from A to D, or QM, and every event rated A to D gets a safety goal. In the concept phase it follows the item definition (ISO 26262-3:2018, Clause 6), and every later safety requirement traces back to its safety goals.
Concept phase
You split a safety requirement across redundant elements that are sufficiently independent, so each one can be developed to a lower ASIL. A typical case is an ASIL D requirement split into two ASIL B(D) requirements. The allowed combinations are in ISO 26262-9:2018, Clause 5. The split only holds if a dependent failure analysis shows enough independence between the elements.
Concept phase
The functional safety concept says what the item must do to stay safe. It turns the safety goals into functional safety requirements (ISO 26262-3:2018, Clause 7). The technical safety concept says how the system does it. It turns those requirements into technical safety requirements and allocates them to hardware and software (ISO 26262-4:2018, Clause 6).
Safety analyses
FMEA works bottom up. It starts from the failure modes of each component and follows their effects on the system. FTA works top down. It starts from one unwanted event and finds the combinations of faults that cause it. For the system architecture, ISO 26262-4:2018, Clause 6.4 highly recommends an inductive analysis such as FMEA at every ASIL, and a deductive analysis such as FTA for ASIL C and D.
02 / Choose how far to go
A complete guide to get started. A core collection for the fundamentals. The full library for the questions your work brings next.
1complete concept guide
Learn with the full Functional Safety Concept guide and its video course.
14released guides, including Free
Build a working understanding of risk, requirements and hardware metrics.
83released guides, including Pro
Connect the whole picture, from concept and architecture to analysis and evidence.
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Before you start
The format, the free account, and what your subscription unlocks.
A focused, self-paced course on one functional safety topic. You work through structured chapters, explanations, diagrams and automotive examples. The guides help you understand the reasoning and connect it to practical work. They complement the ISO 26262 standard.
You can read the public guide overviews without an account. Register free to open the complete Functional Safety Concept guide: 13 chapters, interactive diagrams and its two-hour video course. No credit card is required.
Pro includes 14 released guides in total, including the free FSC guide, HARA, ASIL decomposition and hardware metrics. Expert includes all 83 released guides, adding topics such as TSC, FMEA, FTA and safety mechanisms. Each guide shows every plan that includes it. Pricing lists the other tools and resources included in each plan.
Video courses are available for HARA, Functional Safety Concept, Technical Safety Concept, ASIL decomposition, hardware metrics and tool confidence. The other guides use written chapters, diagrams and examples. Video runtimes are shown where a course is available.
Use the guides to build understanding, revise a topic or work through a project question. The platform also offers practice exams, work product templates and simulators; access depends on your plan. Certification requirements are set by the relevant certification provider.
The 83-guide total counts released guides. You can choose to include guides in preparation when browsing the library; those entries are explicitly labelled and are not promised as available subscription content.
Your first connection starts here
Open the free Functional Safety Concept guide and start connecting the ideas.